A PROCESS FOR AQUEOUS MILLING OF QUINACRIDONE PIGMENTS

The present invention is directed to a process of reducing the particle size of a crude beta- or gamma-quinacridone pigment in a crystal phase, while maintaining the crystal phase, comprising the steps of: combining a milling composition comprising 2,9-dichloroquinacridone with the crude quinacridon...

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Bibliographische Detailangaben
Hauptverfasser:	SCHILLING, Gordian, CARTER, Rhonda, CAMPBELL, Colin Dennis, HE, Yingxia
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ADHESIVES AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS DYES GENERAL PROCESSES OF COMPOUNDING GLASS HETEROCYCLIC COMPOUNDS JOINING GLASS TO GLASS OR OTHER MATERIALS LAKES METALLURGY MINERAL OR SLAG WOOL MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS MORDANTS NATURAL RESINS ORGANIC CHEMISTRY ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES ORGANIC MACROMOLECULAR COMPOUNDS PAINTS POLISHES SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS SURFACE TREATMENT OF GLASS THEIR PREPARATION OR CHEMICAL WORKING-UP USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS WORKING-UP
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Beschreibung
Zusammenfassung:	The present invention is directed to a process of reducing the particle size of a crude beta- or gamma-quinacridone pigment in a crystal phase, while maintaining the crystal phase, comprising the steps of: combining a milling composition comprising 2,9-dichloroquinacridone with the crude quinacridone pigment and optionally 4,11-dichloroquinacridone, and milling to reduce the particle size of said pigment.